Equalizing-bar for trucks.



PATENTED MAY 10, 1904.

S. A. BEMIS. EQUALIZING BAR POI} TRUCKS.

APPLICATION FILED OUT. 5. 1903.

N0 MODEL.

UNITED STATES Patented May 10, 1904.

PATENT OEEIcE.

SUMNER A. BEMIS, OF SPRINGFIELD, MASSACHUSETTS, ASSIG-NOR TO BEMIS CAR TRUCK COMPANY, OF NEI V YORK, N. Y., A CORPORA- 'TION OF NEW JERSEY.

EQUALIZING-BAR FOR TRUCKS- SPECIFICATIONforming part of Letters Patent No. 759,230, dated May 10, 1904.

Application filed October 5, 1903. Serial No. 175,887. (No model.)

To all whom it may concern.-

Be it known that I, SUMNER A. Burns, a citizen of the United States of America, and a resident of Springfield, in the county of Hampden and State of Massachusetts, have invented certain new and useful Improvements in Equalizing- Bars for Trucks, of which the following is a full, clear, and exact description.

This invention relates to certain details of construction comprised in the organization of a truck for street-railway cars, pertaining more especially to the form and arrangement of separate but adjacent axleboX-sup1.iorted members, which constitute in part portions of the truck-frame and in part the means for sustaining the weight of the car and its load.

The object of the invention is to acquire formations and arrangements of the side portions of the truck which, while permitting in the organization of the truck, a division or distribution of the weights, so that the car and its load may be sustained by different supports from those which sustain the truck-frame and its equipments. These supporting parts may be practically inclosed one within the other for a most compact disposition; and another object is to have the truck frame portions arranged to constitute means for the restraint and guidance of a car-supporting bolster.

The invention consists in the combination and arrangement of parts and the construction of certain of the parts, all substantially as hereinafter fully dcscribechand set forth in the claims.

In the drawings, Figure 1 is a side elevation of some parts in vertical section,showing the side frame spring supported on the journalboXes and the equalizing-bar directly supported on the journal-boxes and arranged within the hollow side frame. Fig. 2 is a plan view of substantially the parts shown in Fig. 1. Fig. 3 is a perspective view of what is herein termed the equalizing-bar. Fig. 4

is a plan View of an underneath portion of the equalizing-bar, Fig. 5 being a vertical section, in its properly upright position, of the portion of the co ualizer-bar, taken on line 5 5, Fig. 4:.

In the drawings, A A represent the journalboxes understood as supported on the carwheel axles in the usual manner, and B represents one of the side members or yoke-beams comprised in the truck-frame, it being understood that in the truck there are a pair of these side frames, one at each side of the truck, the same being united by cross members a at the ends of the truck-frame, constituting, with the side members, a rectangular structure having upper and lower intermediate transverse uniting transoms or girders b and If.

Each of the yoke-beams or side members B of the truck-frame comprises parallel separate bars or portions 10 10, having at positions in their length corresponding to the positions of the journal-boxes the transverselyextended formations comprising uniting-webs 12, adjacent and inside of each of which the structure has the form of a hollow hub or downwardly-opening cup 13, while outside thereof the structure is continued in the form of a single bar portion 14, to which the cross member ct is bolted.

The intermediate portions of separated members 10 10 have the space between them both upwardly and downwardly open, the top wall 15 of the yoke-frame B terminating about as indicated at 16 in the drawings, and each of the side frames or yoke-frames B has in the aspect of its side elevation a pair of downwardly-opening journal-box yolres (Z (Z for engagement with the vertical front and rear sides of the journal-boxes, and it has at its intermediate portion a U shape or the form of an upwardly-opening yoke f, the separated. up

and'upwardly and forwardly and rearwardly inclined members 22 22, having comparatively slight width or horizontal dimension, so that this member may have disposed between and within the separated side members 10 10 of the yoke-frame B the horizontally-turned ex-- tremities 23 23, being arranged to rest directly on the tops of the journal-boxes within the hollow inverted-cup-like portions 13 13 of the yoke-frame, there being space at either side of the extremities 23 23 of the equalizing-bar for the accommodation of the paired spiral springs g, which rest on the tops of the journal-boxes and support the yoke-frame B resiliently.

Now while the yoke-frames comprised at each side of the truck and cross-united have no oiiice for sustaining any portion of the car or the load thereon they form no impediment to the disposition in the arrangement shown of a member D at each side of the truck, which have been herein termed the equalizingbars and on which, through the medium of the elliptic springs G, the transverse horizontal bolster E is supported for a yielding movement; but the upstanding members 18 18 of the intermediate upwardly-opening yoke f of the yoke or truck-frame coact with the carsupporting bolster to the extent of constraining it in its proper central disposition of the truck, permitting its up and down movements with and against the elliptic springs and resisting on sudden starting or stopping of the car or sudden changes of speed thereof the tendency of the bolster to be thrown relatively forwardly or backwardly.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is-

1. In a railway-car truck, the combination with the journal-boxes, of the equalizing-bar comprising a horizontal intermediate portion, upwardly-extending portions and horizontal end members resting on the tops of the boxes, and serving as a primary support for the carbody, and a yoke-frame comprising near the end portions thereof, yokes (Z (Z, embracing and spring-sustained from the journal-boxes and having a longitudinally-ranging intermediate horizontal portion comprising an upwardly-opening yoke f, substantially as de scribed.

2. In a railway-car truck, the combination with the journal-boxes and the equalizing-bar comprising horizontal intermediate portion, upwardly-extending end portions, and horizontal extremities resting on the tops of the boxes, of a yoke-frame comprising separated intermediate members 10 10 with openings between them at top and bottom, downwardlyopening yokes toward their ends, comprising top uniting-walls 15 and having end extensions to each of which a transverse member (6 is connected, springs mounted on the top of the box at the opposite sides of the extremities of the equalizing-bar on the tops of which the uniting portions 15 of the yoke-frame bear, and the separated side members of the yoke-frame being disposed along and adjacent the opposite sides of the equalizing-bar which ranges therewithin.

3. In a railway-car truck, the combination with the front and rear journal-boxes at the side of the truck, and the equalizing-bar comprising a horizontal intermediate portion, upwardly-extending end portions, and the horizontal extremities 23 resting on the tops of the boxes, of the side member B having intermediately the upwardly-opening yoke f, and side member B comprising the horizontally and longitudinally extending separated bars 10 10, intermediately open at top and bottom and having the uniting top wall 15 toward each end portion and formed below such walls with the downwardly opening yokes (Z (Z whichembrace the journal-boxes, the side bars of the side member B being disposed along the outer and inner sides of the equalizing-bar, a car-body-supporting bolster having the ends thereof engaged within the upstanding members of the yokef and springs sustained on the equalizing-bar and supporting the bolster.

1. In a railway-car truck, the combination with the front and rear journal-boxes and the equalizing-bar of the bowed form shown having its extremities resting on top of the box, of spiral springs g g resting on the top of the box at opposite sides of the extremities of the equalizing-bar, the side member B having intermediatel y the upwardly-openin g yoke f and comprising the separated bars 10 10 intermediately open at top and bottom, and comprising toward the ends the journal-boxembracing yokes (Z (Z having top walls 15, between which and the tops of the boxes the aforesaid springs g g are disposed and the extremities of said side members B forward and to the rear of the yokes (Z having the transverse uniting-bars a, a car-body-supporting bolster having the ends thereof engaged Within the upstanding members of the yokef, and springs sustained on the equalizing-bar, and supporting the bolster. 1

Signed by me at Springfield, Massachusetts, in presence of two subscribing witnesses, on the 25th day of September, 1903.

SUMNER A. BEMIS.

WVitnesses:

A. V. LEAHY, W'M. S. BELLOWS. 

